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vak255 · Intermediate Joined: 10 Sep 2004 Posts: 384 Topics: 79

I have a PS file from which we are removing the invalid records.

This GDG has total of 4814326 records out of which 145965 records were invalid. Removing them will result in space saving of 3.03% .

Please find below the details.

kolusu · Posted: Tue May 20, 2014 11:59 am Post subject:

vak255,

You can use ISMF to generate reports for space usage before and after removing the invalid records.

Kolusu

vak255 · Intermediate Joined: 10 Sep 2004 Posts: 384 Topics: 79

Thanks Kolusu.
There are 1000s of files, I am trying to calculate it prior to removing the records.

So from the above sample, if I remove 145965 records from the file. Each record extends to 128.

so total space reduced is 145965 * 128 = 18683520 bytes ?

kolusu · Posted: Tue May 20, 2014 1:06 pm Post subject:

vak255,

If the space is NOT released(RLSE parm in JCL) after the step completion then you won't see the free space even though you deleted the records. So make sure every step has RLSE coded.

ISMF gives you a lot of options to generate a report based on VOLUME and Dataset name filter.

Kolusu
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Kolusu
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vak255 · Intermediate Joined: 10 Sep 2004 Posts: 384 Topics: 79

Thanks for all the details.
The steps already has the RLSE coded.

How should I generate ISMF report?

kolusu · Posted: Tue May 20, 2014 3:59 pm Post subject:

vak255 · Intermediate Joined: 10 Sep 2004 Posts: 384 Topics: 79

Thanks so much, Kolusu.